Question

Assume that programs spend about 25% of their time waiting for I/O operations to complete. If there are FOUR programs loaded into memory, what is the processor utilization

Answer 1

Answer:

0.9961

Explanation:

Given that:

Proportion of time waiting for I/O operation to complete = 25% = 0.25

Number of programs waiting in memory = 4

Using the CPU Utilization formula :

CPU Utilization = 1 - p^n

1 - 0.25^4

1 - 0.00390625

0.99609375